Which Statement About Facilitated Diffusion Across a Membrane Is TRUE

question 101

Multiple Choice

Which statement about facilitated diffusion across a membrane is TRUE?

• A) A specific membrane protein lowers the activation energy for movement of the solute through the membrane.
• B) It can increase the size of a transmembrane concentration gradient of the diffusing solute.
• C) It is impeded by the solubility of the transported solute in the nonpolar interior of the lipid bilayer.
• D) It is responsible for the transport of gases such as O₂, N₂, and CH₄ across biological membranes.
• E) The rate is not saturable by the transported substrate.

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